Results 281 to 290 of about 817,831 (307)

A question on common fixed points

1999
The authors give a partial answer to the following problem: Let \(X\) be a compact space with the fixed point property and \({\mathcal F}\) a family of continuous mappings from \(X\) to \(X\) such that \(|{\mathcal F}|\geq{\mathfrak c}\). In which conditions on \({\mathcal F}\) and \(X\) there is a subfamily \({\mathcal F}_0\subset{\mathcal F}\) of ...
CAMMAROTO, Filippo, MATVEEV M. V.
openaire   +2 more sources

Common Fixed Points of Pairwise Commuting Mappings

Mathematische Nachrichten, 1984
The author proves the following theorem: Let (X,d) be a complete 2-metric space with d continuous and let S,T: \(X\to X\) be a pair of continuous mappings. Then S and T have a common fixed point in X if and only if there exist mappings \(A,B: X\to SX\cap TX\) such that \(AS=SA\), \(BT=TB\) satisfying \[ (1)\quad d(Ax,By,a)\leq c \max \{d(Sx,Ty,a),\quad
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Common Fixed Points of Commuting Monotone Mappings

Canadian Journal of Mathematics, 1967
We are concerned here with the existence of fixed or common fixed points of commuting monotone self-mappings of a partially ordered set into itself. Let X be a partially ordered set. A self-mapping ƒ of X into itself is called an isotone mapping if x ⩾ y implies ƒ(x) ⩾ ƒ(y).
openaire   +1 more source

Colorectal cancer statistics, 2023

Ca-A Cancer Journal for Clinicians, 2023
Rebecca L Siegel, Nikita Sandeep Wagle, Robert A Smith   +2 more
exaly  

Current treatment and recent progress in gastric cancer

Ca-A Cancer Journal for Clinicians, 2021
Smita S Joshi, Brian D Badgwell
exaly  

Colorectal cancer statistics, 2020

Ca-A Cancer Journal for Clinicians, 2020
Rebecca L Siegel, Kimberly D Miller, Stacey A Fedewa   +2 more
exaly  

Common fixed points for set-valued mappings

1983
Let F and G be mappings of a complete metric space (X,d) into the hyperspace of bounded subsets B(X) satisfying the inequality \[ \delta (Fx,Gy)\leq c.\max \{\delta (x,Gy),\delta (y,Fx),d(x,y)\} \] for all x,y in X, where \(0\leq ...
openaire   +2 more sources

Management of glioblastoma: State of the art and future directions

Ca-A Cancer Journal for Clinicians, 2020
Aaron Tan, David M Ashley, Giselle Lopez
exaly  

Global cancer statistics

Ca-A Cancer Journal for Clinicians, 2011
Frank Bray
exaly  

Cancer statistics in China, 2015

Ca-A Cancer Journal for Clinicians, 2016
Rongshou Zheng, Peter D Baade, Siwei Zhang   +2 more
exaly